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FILE - In this Wednesday, April 25, 2012, file photo, Federal Reserve Chairman Ben Bernanke arrives for a news conference at the Federal Reserve in Washington. The tumultuous Ben Bernanke era at the Federal Reserve moves toward its close with the final policy meeting of his eight-year tenure scheduled for the last week of January 2014. (AP Photo/Susan Walsh, File)

WASHINGTON - The Federal Reserve is expected Wednesday to further reduce its stimulus for the U.S. economy even though that prospect has unsettled global financial markets.

The Fed announced last month that it would pare its monthly bond purchases from $85 billion to $75 billion. And it said that if the economy kept improving, it would likely further slow its bond buying at future meetings. The Fed's bond purchases have been intended to keep long-term loan rates low to spur spending and economic growth.

Most economists expect a string of $10 billion monthly reductions in bond purchases to be announced at each Fed meeting this year, concluding with a final $15 billion cut in December.

The two-day Fed meeting that ends Wednesday will be the last to be presided over by Ben Bernanke, who is stepping down after eight years as chairman and will be succeeded next week by Vice Chair Janet Yellen. She is expected to stick closely with Bernanke's policies.

Last month, along with the modest trim in its bond purchases, the Fed made clear it plans to keep short-term rates historically low "well past" the time the unemployment rate dips below 6.5 per cent. The rate is now 6.7 per cent.

Managing a slowdown in the Fed's bond purchases without roiling markets will pose a tough early test for Yellen. Investors have been nervous in part because a pullback in Fed bond buying will likely mean higher rates. Borrowing could weaken as a result.

Many also fear that higher U.S. rates will lead some bond investors to move cash out of emerging markets and into the United States to seek higher returns. That fear has depressed currency values and roiled stock markets in a number of developing countries.

The Turkish central bank held an emergency meeting Tuesday and announced it was raising a key rate from 7.75 per cent to 12 per cent to try to reduce inflation and boost its currency, the lira, which had fallen to a record low.

The Fed decided in December to start trimming the bond purchases mainly because of evidence the U.S. economy is strengthening and needs less support from the Fed.

Turmoil in overseas markets has battered the currencies of Turkey, Argentina and other emerging economies. Those economies had previously enjoyed an inflow of investor money.

"Now, those countries are having to deal with a reversal of those flows," said David Jones, chief economist at DMJ Advisors and the author of a new book on the Fed.

Jones see the market turbulence as a "perfect illustration of the tricky transition that Yellen will have to manage" as the Fed winds down the programs it put in place after the financial crisis erupted in 2008. Still, he doesn't think the Fed will diverge from the pace of its bond-buying reductions unless market turmoil begins to slow the U.S. economic recovery.

Bernanke is ending his tumultuous eight-year tenure at the Fed amid tentative signs of a stronger U.S. economy. Employers created only 74,000 jobs in December, far below the 214,000 average of the previous four months. But many analysts think the lacklustre December total marked a temporary pause or a statistical aberration.

Throughout 2013, the Fed bought $85 billion a month in Treasury and mortgage bonds to try to keep long-term rates down to stimulate borrowing by businesses and consumers.

Bernanke's first mention of a pullback in bond purchases, in mid-2013, triggered a mini-panic in the stock market. Afterward, the Fed stepped up its efforts to assure investors that a pullback in purchases didn't mean the Fed would soon raise the short-term rates it controls.

Since the recession ended in June 2009, economic growth has remained subpar. Analysts are forecasting a brighter 2014, in part because the federal government will impose less drag this year.

One other reason no surprise is expected from the Fed this week is that it's undergoing a leadership transition. When Yellen takes over next week, she'll become the first woman to lead the Fed in its 100-year history.

Even before she takes over, the central bank will have four new voters from among 11 Fed regional bank presidents whose votes rotate each year.

Kansas City Fed President Esther George dissented seven times last year over her concern that the Fed's bond buying could destabilize financial markets and unleash high inflation. George doesn't have a vote this year. But two others who do â€” Charles Plosser, head of the Philadelphia Fed bank, and Richard Fisher, head of the Dallas Fed bank â€” are, like George, considered inflation "hawks." Plosser and Fisher might dissent if they feel the Fed isn't moving fast enough to pare its bond purchases.

The two other new voters are Minneapolis Fed President Narayana Kocherlakota, who has favoured keeping rates low, and Cleveland Fed President Sandra Pianalto, a moderate who backed Bernanke's policies.

Pianalto plans to step down this year. And President Barack Obama has nominated two new members to the Fed's board. If confirmed by the Senate, Stanley Fischer, former head of the Bank of Israel and a one of Bernanke's former college professors, would become vice chair. And Lael Brainard, a top Treasury official in Obama's first term, would become a Fed governor. Both are viewed as supporters of the Bernanke-Yellen approach to rates.